Setts



(No Model.)

J. A. LAKIN & G. J. EMERSON, Jr.

TIME DAMPER MECHANISM. No. 313,003. Patented Feb. 24, 1885.

WITNESSES I iNVENTOR-S;

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JAMES A. LAKIN AND CYRUS J. EMERSON, JR, OF \VESTF-IELD, MASSA OHU SETTS, ASSIGNORS TO SAID JAMES A. LAKIN.

TIME DAIVIPER MECHANISM.

JL ECIFICATION forming part of Letters Patent No. 313,003, dated February 2 1885.

I Application filed September 1, 1834. (No model.)

.T (ZZZ whom it may concern:

Be it known that we, JAMES A. LAKIN and CYRUS J. EMERSON, J r., citizens of the United States, residing at WVestlield, in the county of 5 Hampden and State of Massachusetts, have invented new and useful Improvements in Time Mechanism for Automatically Operating Dampers and other Mechanical Devices, of which the following is a specification.

Our invention relates to an improved time mechanism for automatically operating a damper or other weight through a ratchet wheel connected therewith and adapted to revolve with a cord-storing drum, or upon an axis having a weighted crank-arm or other lever attachment to revolve said ratchet-wheel when released; and our invention consists, in brief, of a discharge-dial held frictionally to revolve with the hour-hand arbor of a clock, and adapted to be turned upon said arbor to be set relatively tothe hour-hand with which it revolves; mechanism in operative contact with said discharge-dial, to bring at a predetermined time an indentation in the pcriphery of a wheel to a certain point; apawl having an arm held by 'a spring in contact with the periphery of said wheel and adapted to enter the indentation therein when opposite the same, to thereby release a pawl, and 0 a ratchet-wheel having a weight disposed to revolve it when free, and adapted to be released when a retaining-pawl has an arm enter the indentation upon the wheel-surface, against which it is held to bear.

Our invention also consists in the combination, with a time-operated pawl and with a ratchet-wheel, of an auxiliary pawl operating to independently hold the ratchet-wheel, and adapted to be released therefrom automatic- 40 ally by the time-pawl upon engagement with said ratchetwheel, the object of this part of our invention being to enable the ratchetwheel to be held when the time-actuated pawl is in an inoperative position, and to cause the act of combining the timepawl with mechanism for ultimately tripping it to release the auxiliary pawl, so that the ratchet may not be held by inadvertence to be inoperative when required to move.

This invention is fully illustrated in the accompanying drawings, in which Figure 1 is a plan view of our invention, and Figs. 2 and 3 modifications in plan view of the mechan ism shown in Fig. l for illustrating the prin ciple of our invention.

While this invention is adapted for use in any position where a weight is to be released at a set time, it is more particularly designed to be employed as a means of releasing and so closing a damper of a furnace, and is shown in Fig. 1 in combination with a cord-carrying drum and cord, which is supposed to be connected to a damper. (Not shown.)

D is the discharge-dial, frictionally' held over the arbor of the hour hand E of a clock. by means of a spring slit sleeve, which binds upon the arbor to revolve with it, but which permits the dial D to be manually turned to have any number thereon brought beneath the hour-hand.

d is a pin projecting from the vertical surface of said dial D.

F is a lever hinged atf, and provided with a free end, 9, the segment of a circle having the pivot f as its center. The end 9 lies in the same plane with the dial-pin d, and is provided with teeth and interdental spaces adapted to cause the pin d in the revolution of its dial to come against a tooth and swing the le ver F, to leave the next tooth upon the segment in the path of the pin (1 in its succeeding revolution.

H is a wheel concentric to the axis f and fast to the lever F.

It is an indentation in the periphery of wheel H.

i is an arm from a pawl, I, pivoted at i, and o is a spring attached to the pawl and to a fixed point, and operating to bear one end of arm 2' against the periphery of wheel H.

J is a ratchet-wheelengaged by the pawl I, having a handle, j, a drum, m, and cord n.

p is a segment of a dial, and T is a tell-tale pointer, indicating the position of the segment 9 relative to dial 1).

s is a prolongation of lever F beyond its axis to the outside of the clockcase, and providing a convenient means of setting the segment 9.

In operation, the discharge-dial D is turned by hand to have the hour thereon at which it is desired the segment 9 shall be moved brought et-wheel J.

In Fig. 1 a small roller is shown upon arm '5, to form an anti-friction surface with wheel H.

N is an auxiliary pawl provided with a spring, t, operating in a direction, as seen in Fig. 1, to-hold the pawl away from the ratchet-wheel and to withdraw it from said wheel when released, said springtnot being powerful enough, however, to release said pawl when held by the friction due to the weighted wheel J in contact therewith. The pawl N is provided with an end, a, relatively arranged to an end, 1), of pawl l, to cause the end 0 to trip the pawl N when the one I is holding the wheel J. When, for instance, the drum an having discharged the cord n, and the armt' having its end within the indentation h, it is desired to open the damper in the day-time and. retain it so under the eye of the engineer,

the drum is wound by means of the handle j,

and so held by means of the pawlN manually pushed against its spring, to be frictionally held, as above described, by the weighted ratchet-wheel J. The end 1; of pawl I, when the arm 1' is in the depression h, is below and out of the way of end a of pawl N; but when pawl I is brought down by hand to engage with ratchet-wheel J, to permit the lever F with its wheel H to be set, the act of lowering pawl I throws the pawl N loose and permits its spring to retract it to the position seen in Fig. I.

To facilitate the bringing of pawl I into operative position, the lengths of pawls N I from their pivots to their detents are proportioned to leave a clear space of about one-sixteenth of an inch between the detent of pawl I and the opposite tooth of ratchet-wheel J when the latter is held by pawl N, which slight interval permits the pawl I to be lowered without care to engage the ratchet-wheel and trip the pawl N.

Fig. 2 shows the wheel H actuated by the discharge-dial D through intermediate mechanism, consisting of a pawl, A, pivoted at a, having an upper end in the path of the pin (1, and having a spring, 0, to turn it when released by pin d, and in so returning it revolve a ratchet-wheel, 13, carrying the wheel H, a pointer, b, fixed to the case and a dial upon wheel B, taking the place of these parts different] y arranged in Fig. 1. y

In Fig. 3 the wheel H upon the ratchetwheel B is shown actuated by discharge-dial D through an arm, 0, moved by the pin d to rotate wheel B, and restored by gravity when released by pin d.

Now, having described our invention, what we claim is 4 1. The improved time mechanism for discharging a weight-revolved ratehet-wheel,con-

sisting of a discharge-dial adapted to move with the hour-hand of a clock and be adjustable relative thereto upon its arbor, a wheel, H, having a peripheral bearing-surface, substantially as shown, and provided with an indentation, ash, therein, means, substantially: as shown, for converting the rotation of dial D to a rotation of wheel H, a weight-actuated ratchet-wheel, as J, and a pawl arranged to engage wheel J, provided with an arm bearing upon the periphery of wheel H, and adapted to, at a predetermined time, enter the indentation h andrelease the ratch et-wheel J, as and for the purpose set forth.

2. In atime mechanism forreleasing aweightrevolved ratchet-wheel, the combination, with a pawl adapted to release a ratchet-wheel at a predetermined time, of a pawl adapted to hold the ratchet when engaged therewith, and to clear said wheel when released from the weight thereof, the two pawls being combined and ar-- ranged as described, to cause the act of bringing the time-pawl into operative position to throw out the other, as and for the purpose set forth.

JAMES A. LAKIN. CYRUS J. EMERSON, JR.

Witnesses:

H. B. LEWIs, W. F. CARSON. 

